Schumacher, J. N. (2011). The Rizal bill of 1956: Horacio de la Costa and the bishops. Philippine Studies: Historical and Ethnographic Viewpoints.
Lua i Stíl Chicago (17ú heag.)Schumacher, John N. "The Rizal Bill of 1956: Horacio De La Costa and the Bishops." Philippine Studies: Historical and Ethnographic Viewpoints 2011.
Lua MLA (9ú heag.)Schumacher, John N. "The Rizal Bill of 1956: Horacio De La Costa and the Bishops." Philippine Studies: Historical and Ethnographic Viewpoints, 2011.
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